Revert "NetEQ RTP Play: Optionally write output audio file"

This reverts commit 6330818ec8159ee476481ba4a89f884fb3653f3f.

Reason for revert: This breaks api/test/neteq_simulator_factory.cc, which unfortunately was not caught by our bots.

Original change's description:
> NetEQ RTP Play: Optionally write output audio file
> 
> This CL makes the output audio file optional to more
> quickly run neteq_rtpplay when no audio output is needed.
> The CL also includes necessary adaptations because of pre-existing
> dependencies (e.g., the output audio file name is used to create
> the plotting script file names).
> 
> The command line arguments are retro-compatible - i.e., same behavior
> when specifying the output audio file and the new flag
> --output_files_base_name is not used.
> 
> This CL also includes a test script with which the retro-compatibility
> has been verified.
> 
> Bug: webrtc:10337
> Change-Id: Ie3f301b3b2ed0682fb74426d9cf452396f2b112b
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/126224
> Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
> Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#27067}

TBR=henrik.lundin@webrtc.org,alessiob@webrtc.org,ivoc@webrtc.org

Change-Id: I0c63a8ba9566ef567ee398f571f2a511916fa742
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:10337
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/127293
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Commit-Queue: Ivo Creusen <ivoc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27078}
diff --git a/modules/audio_coding/neteq/tools/neteq_rtpplay.cc b/modules/audio_coding/neteq/tools/neteq_rtpplay.cc
index 7ebc326..36c03b8 100644
--- a/modules/audio_coding/neteq/tools/neteq_rtpplay.cc
+++ b/modules/audio_coding/neteq/tools/neteq_rtpplay.cc
@@ -11,12 +11,9 @@
 #include <iostream>
 #include <string>
 
-#include "absl/strings/string_view.h"
-#include "absl/types/optional.h"
 #include "modules/audio_coding/neteq/tools/neteq_test.h"
 #include "modules/audio_coding/neteq/tools/neteq_test_factory.h"
 #include "rtc_base/flags.h"
-#include "rtc_base/strings/string_builder.h"
 #include "system_wrappers/include/field_trial.h"
 #include "test/field_trial.h"
 
@@ -120,10 +117,6 @@
 WEBRTC_DEFINE_int(video_timing,
                   TestConfig::default_video_timing(),
                   "Extension ID for video timing");
-WEBRTC_DEFINE_string(output_files_base_name,
-                     "",
-                     "Custom path used as prefix for the output files - i.e., "
-                     "matlab plot, python plot, text log.");
 WEBRTC_DEFINE_bool(matlabplot,
                    false,
                    "Generates a matlab script for plotting the delay profile");
@@ -217,54 +210,6 @@
   PrintCodecMappingEntry("comfort noise (48 kHz)", FLAG_cn_swb48);
 }
 
-bool ValidateOutputFilesOptions(bool textlog,
-                                bool plotting,
-                                absl::string_view output_files_base_name,
-                                absl::string_view output_audio_filename) {
-  bool output_files_base_name_specified = !output_files_base_name.empty();
-  if (!textlog && !plotting && output_files_base_name_specified) {
-    std::cout << "Error: --output_files_base_name cannot be used without at "
-              << "least one of the following flags: --textlog, --matlabplot, "
-              << "--pythonplot." << std::endl;
-    return false;
-  }
-  // Without |output_audio_filename|, |output_files_base_name| is required when
-  // one or more output files must be generated (in order to form a valid output
-  // file name).
-  if (output_audio_filename.empty() && (textlog || plotting) &&
-      !output_files_base_name_specified) {
-    std::cout << "Error: when no output audio file is specified and --textlog, "
-              << "--matlabplot and/or --pythonplot are used, "
-              << "--output_files_base_name must be also used." << std::endl;
-    return false;
-  }
-  return true;
-}
-
-absl::optional<std::string> CreateOptionalOutputFileName(
-    bool output_requested,
-    absl::string_view basename,
-    absl::string_view output_audio_filename,
-    absl::string_view suffix) {
-  if (!output_requested) {
-    return absl::nullopt;
-  }
-  if (!basename.empty()) {
-    // Override the automatic assignment.
-    rtc::StringBuilder sb(basename);
-    sb << suffix;
-    return sb.str();
-  }
-  if (!output_audio_filename.empty()) {
-    // Automatically assign name.
-    rtc::StringBuilder sb(output_audio_filename);
-    sb << suffix;
-    return sb.str();
-  }
-  std::cout << "Error: invalid text log file parameters.";
-  return absl::nullopt;
-}
-
 }  // namespace
 
 int main(int argc, char* argv[]) {
@@ -276,7 +221,7 @@
       program_name +
       " --help for usage.\n"
       "Example usage:\n" +
-      program_name + " input.rtp [output.{pcm, wav}]\n";
+      program_name + " input.rtp output.{pcm, wav}\n";
   if (rtc::FlagList::SetFlagsFromCommandLine(&argc, argv, true)) {
     exit(1);
   }
@@ -289,16 +234,11 @@
     PrintCodecMapping();
     exit(0);
   }
-  if (argc < 2 || argc > 3) {  // The output audio file is optional.
+  if (argc != 3) {
     // Print usage information.
     std::cout << usage;
     exit(0);
   }
-  const std::string output_audio_filename((argc == 3) ? argv[2] : "");
-  const std::string output_files_base_name(FLAG_output_files_base_name);
-  RTC_CHECK(ValidateOutputFilesOptions(
-      FLAG_textlog, FLAG_matlabplot || FLAG_pythonplot, output_files_base_name,
-      output_audio_filename));
   RTC_CHECK(ValidatePayloadType(FLAG_pcmu));
   RTC_CHECK(ValidatePayloadType(FLAG_pcma));
   RTC_CHECK(ValidatePayloadType(FLAG_ilbc));
@@ -357,19 +297,10 @@
   config.video_timing = FLAG_video_timing;
   config.matlabplot = FLAG_matlabplot;
   config.pythonplot = FLAG_pythonplot;
+  config.textlog = FLAG_textlog;
   config.concealment_events = FLAG_concealment_events;
   config.max_nr_packets_in_buffer = FLAG_max_nr_packets_in_buffer;
   config.enable_fast_accelerate = FLAG_enable_fast_accelerate;
-  if (!output_audio_filename.empty()) {
-    config.output_audio_filename = output_audio_filename;
-  }
-  config.textlog_filename =
-      CreateOptionalOutputFileName(FLAG_textlog, output_files_base_name,
-                                   output_audio_filename, ".text_log.txt");
-  config.plot_scripts_basename = CreateOptionalOutputFileName(
-      FLAG_matlabplot || FLAG_pythonplot, output_files_base_name,
-      output_audio_filename, "");
-
   // Check if an SSRC value was provided.
   if (strlen(FLAG_ssrc) > 0) {
     uint32_t ssrc;
@@ -377,8 +308,8 @@
     config.ssrc_filter = absl::make_optional(ssrc);
   }
 
-  std::unique_ptr<webrtc::test::NetEqTest> test = factory.InitializeTest(
-      /*input_filename=*/argv[1], config);
+  std::unique_ptr<webrtc::test::NetEqTest> test =
+      factory.InitializeTest(argv[1], argv[2], config);
   test->Run();
   return 0;
 }